MPX Magnetostrictive Level Sensors
Installation Guide
For MPX-F
R
APG
Automation Products Group, Inc.
1025 W 1700 N Logan, UT 84321
www.apgsensors.com | phone: 888-525-7300 | email: [email protected]
Thank You
Thanks for purchasing a MPX series magnetostrictive level sensor from us! We appreciate your
business and your trust. Please take a moment to familiarize yourself with the product and this
manual before installation. If you have any questions, at any time, don’t hesitate to call us at 888-
525-7300.
1.Description
2. How To Read Your Label
3. Warranty
4. Dimensions
5. Installation Guidelines &
Instructions
6. Sensor and System Wiring
7.General Care
8. Repair Information
9. Hazardous Location Wiring
Table of Contents
5
Installation Guidelines & Instructions
The MPX should be installed in an area--indoors or outdoors--which meets the following
conditions:
• Ambient temperature between -40°F and 185°F (-40°C to 85°C)
• Relative humidity up to 100%
• Altitude up to 2000 meters (6560 feet)
• IEC-664-1 Conductive Pollution Degree 1 or 2
• IEC 61010-1 Measurement Category II
• No chemical corrosive to stainless steel (such as NH
3
, SO
2
, Cl
2
, etc.)
• Ample space for maintenance and inspection
Additional care must be taken to ensure:
• The probe is located away from strong magnetic elds, such as those produced by motors,
transformers, solenoid valves, etc.
• The medium is free from metallic substances and other foreign matter.
• The probe is not exposed to excessive vibration.
• The oat(s) t through the mounting hole. If the oat(s) does/do not t, it/they must be
mounted on the stem from inside the vessel being monitored.
• The oat(s) is/are oriented properly on the stem (See Figure 5.1 below). MPX-F oats are
installed by customer.
4
Dimensions
NOTE: Scan the QR code to the right to see the full
user manual on your tablet or smartphone. Or visit
www.apgsensors.com/support to nd it on our website.
Part # 122950-0033
Doc #9004830 Rev B
Each label comes with a full model number, a part number, and a serial number. The model
number for the MPX will look something like this:
The model number correlates with all the congurable options and tells you exactly what you have.
Compare the model number to the options on the datasheet to identify your exact conguration.
You can also call us with the model, part, or the serial number and we can help you.
You’ll also nd all hazardous certication information on the label.
SAMPLE: MPX-F3-ZY-F2.5WB-120
The MPX-F series magnetostrictive level sensor provides highly accurate and repeatable level
readings in a wide variety of liquid level measurement applications. It is certied for installation
in hazardous areas in the US and Canada by CSA for Class I, Division 2 and Class I, Zone 2
environments.
1
Description
2
How To Read Your Label
3
Warranty
MPX-F Dimensions
Figure 5.1
UP
Taper
This product is covered by APG’s waranty to be free from defects in material and workmanship
under normal use and service of the product for 24 months. For a full explanation of our Warranty,
please visit https://www.apgsensors.com/about-us/terms-conditions. Contact Technical Support to
receive a Return Material Authorization before shipping your product back.
Scan the QR code below to read the full explanation of our Warranty on your tablet or smartphone.
IMPORTANT: Floats must be oriented properly
on the stem, or sensor readings will be inaccurate
and unreliable. Untapered oats will have a sticker
indicating the top of the oat. Remove sticker prior to
use.
Assemble sensor mounting, oat(s), weight and pins at installation location, if possible.
• Slide mounting option onto stem. Loosen compression cap so it will slide easily on stem.
• Note: If the oats do not t through the tank/vessel mounting hole, mount them on the stem
from inside the vessel being monitored. Then secure the sensor to the vessel.
• Slide oats onto stem. If using two oats, slide the lighter oat on rst. Tops of oats will be
indicated by sticker. After ensure top of oat is toward MPX-F sensor head, remove sticker.
• For sensors with oat stops, refer to the assembly drawing included with the sensor for oat
stop installation locations.
• Insert weight on end of stem. Hold in place with clevis pin.
• Insert cotter pin in clevis pin. Bend ends of cotter pin back to lock pins into place.
Install MPX-F sensor on tank
• When lifting and installing the sensor be sure to minimize the bending angle between the
rigid stem at the top and bottom of the sensor and the exible stem in-between. Sharp bends
at those points could damage the sensor.
• If your sensor’s stem and oats t through the mounting hole, insert the weight and the oats
into the mount opening.
• Carefully unroll and feed the MPX-F sensor stem into the tank. Slide the mount up to the top
of the stem.
• When the weight is on the bottom of the tank, secure the mounting option to the vessel.
• Take any slack out of the exible stem. Tighten the compression tting to hold stem in place.
Electrical Installation Instructions:
• Remove the housing cover of your MPX.
• Feed Systemwires into MPX through 3/4” NPT conduit openings. Fittings must be UL/CSA
Listed for CSA installation.
• Connect wires to MPX terminals. Use crimped ferruls on wires, if possible.
• Replace the housing cover.
• For lightning and surge protection on MPX-F4 models, either connect the grounding screw
(see Dimensions section 4) to an earth ground, or ensure that tank mounting of MPX is
grounded.
See Electrical Connections and System Wiring Diagrams (section 6) for Modbus and 4-20 mA
wiring examples.
BOT DEADBAND
6.0"
[152mm]
TOTAL LENGTH
TOP DEADBAND
10.0"
[254mm]
MEASURABLE LENGTH (PER ORDER)
MOUNTING OPTION FLOA T(S)
7.03"
[179mm]
4.34"
[110mm]
4.98"
[126mm]
2x ø2.76"
THRU
FLOA T
STOP
2x 3/4" NPT
CONDUIT
OPENINGS
4.34"
[110mm]
MPX-F STEM
ASSEMBLY
HOUSING
ADAPTER
HOUSING
GROUND
SCREW
6
Sensor and System Wiring Diagrams
9
Hazardous Location Wiring
MPX-F2 / MPX-F3 Communication Wiring
MPX-F2 / MPX-F3 System Wiring
IMPORTANT: Refer to section 9 for Hazardous Location Wiring.
NOTE: For APG Modbus programming instructions, please see
MPX user manual. APG Modbus software can be downloaded from
www.apgsensors.com/support.
MPX-F4 Modbus System Wiring
Power
Supply
+12-24 Vdc
GND
Use Shielded Cable
120 Ω
terminating
resistor
120 Ω
terminating
resistor at
last sensor
V+
B
A
Sensor 1
GND
V+
B
A
Sensor 2
GND
V+
B
A
Sensor 3
GND
Master
Device
RS-485 A
RS-485 B
MPX-F4
series sensor
MPX-F4
series sensor
MPX-F4
series sensor
EARTH
GND
Note: Earth Ground terminal is factory
connected to internal housing ground
lug.
EARTH
GND
EARTH
GND
MPX-F4 Modbus System Wiring with RST-6001
Power
Supply
+12-24 Vdc
GND
Use Shielded Cable
Equivalent 120 Ω
terminating resistor
internal to RST-6001
120 Ω
terminating
resistor at
last sensor
USB to computer
with APG Modbus
software
RST-6001
Modbus
Controller
V+
B
A
Sensor 1
GND
V+
B
A
Sensor 2
GND
V+
B
A
Sensor 3
GND
A
B
-5V
MPX-F4
series sensor
+5V
MPX-F4
series sensor
MPX-F4
series sensor
Note: An independent +12-24 Vdc
power supply is required when
using an RST-6001 Modbus Controller.
The RST-6001 can only supply ±5 Vdc,
not the +12-24 Vdc required by the MPX.
EARTH
GND
EARTH
GND
EARTH
GND
Note: Earth Ground terminal is factory
connected to internal housing ground lug.
12-24 Vdc
Out 1
Out 2
Input 1 Input 2 Com
Receiver
Sensor
Sensor
4-20 mA Dual Float Loop Wiring
(MPX-F3 Series)
Input Com
Receiver 1
Input Com
Receiver 2
OR
+
Power Source
(12-24 Vdc)
−
12-24 Vdc
Out 1
Out 2
Sensor
+
Power Source
(12-24 Vdc)
−
12-24 Vdc
Out
4-20 mA Single Float Loop Wiring
(MPX-F2 Series)
Input Com
Receiver
+
Power Source
(12-24 Vdc)
−
12-24 Vdc
Out (1)
Power
Source
(14- 24 Vdc)
Sensor
Out 24V
RST-4100
Load Resistor
(150 Ω to 700 Ω)
Wired in series for
programming.
+
−
Note: a minimum of
14 Vdc is required to
establish communications
with the RST-4100
Programming Module
and APG Modbus software
required for programming
MPX-F2 and MPX-F3
series sensors.
USB to computer
with APG Modbus
software
Out 2
MPX-F2 or
MPX-F3 series
sensor.
Programming configuration is
for programming ONLY. After
programming, sensor must be
reintegrated to 4-20 mA loop
for proper system operation.
IMPORTANT: For lightning and surge protection on an MPX-F4,
either connect the grounding screw (see section 4) to an earth
ground, or ensure that tank mounting of the MPX-F4 is grounded.
IMPORTANT: MPX level sensor MUST be installed according to drawing 9003468
(Hazardous Installation and Non-Incendive Wiring Drawing) in section 9 to meet listed
approvals. Faulty installation will invalidate all safety approvals and ratings.
DANGER: WARNING -- EXPLOSION HAZARD -- SUBSTITUTION OF COMPONENTS MAY
IMPAIR SUITABILITY FOR CLASS I, DIVISION 2;
AVERTISSEMENT -- RISQUE D’EXPLOSION -- LA SUBSTITIOND E COMPOSANTSP EUTR
ENDRE CE MATERIEL INACCEPTABLE POUR LES EMPLACEMENTS DE CLASSE I, DIVISION 2.
DANGER: WARNING -- EXPLOSION HAZARD -- DO NOT DISCONNECT EQUIPMENT
UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE NON-
HAZARDOUS;
AVERTISSEMENT -- RISQUE D’EXPLOSION -- AVANT DE DECONNECTER L’EQUIPEMENT,
COUPER LE COURANT OU S’ASSURER QUE L’EMPLACEMENT EST DESIGNE NON
DANGEREUX.
DANGER: OPEN CIRCUIT BEFORE REMOVING COVER or KEEP COVER TIGHT WHILE
CIRCUITS ARE ALIVE;
AVERTISSEMENT -- OUVRIR LE CIRCUIT AVANT D’ENLEVER LE COUVERCLE, or GARDER LE
COUVERCLE BIEN FERME TANT QUE LES CIRCUITS SONT SOUS TENSION.
7
General Care
Your level sensor is very low maintenance and will need little care as long as it was installed
correctly. However, in general, you should periodically inspect your MPX unit to ensure the stem
is free of any heavy buildup that might impede the movement of the oat(s). If sediment or other
foreign matter becomes trapped between the stem and oat(s), detection errors can occur.
If you need to remove the oats(s) from the stem of your MPX, be sure to note the orientation of
the oat(s) prior to removal. This will help ensure proper re-installation of the oat(s).
Also, ensure that the housing cover is snuggly secured. If the cover becomes damaged or is
misplaced, order a replacement immediately.
8
Repair Information
If your MPX level sensor needs repair, contact us via email, phone, or online chat on our website.
We will issue you an RMA number with instructions.
• Phone: 888-525-7300
• Email: [email protected]
• Online chat at www.apgsensors.com
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